Re: 2.5 'what to expect'

[Andreas Dilger]

On Jul 12, 2003  20:46 +0100, Jamie Lokier wrote:
> Jeff Garzik wrote:
> > Jamie Lokier wrote:
> > >2.4 fails on write()?  A strace of "rpm --rebuilddb" shows it is
> > >opening with O_DIRECT and writing just fine.  Or does that only work
> > >with RedHat's 2.4 kernels?
> > 
> > Are you testing on a filesystem where an O_DIRECT is not supported?
> > The "it works" case is not an issue.
> 
> ext3.

ext3 in 2.4 kernels does not support O_DIRECT.  To confuse matters,
recent RH kernels silently ignore O_DIRECT if you are not root, so
you may think O_DIRECT is being used, but it isn't.

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/